en aquaculture aquaculture پژوهشي Orginal research papers <span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black">This study determinated the enrichment effect of rotifers (<i>Brachionus plicatilis</i>) with Algamac 3050, Olio &omega;-3<b> </b>and<b> </b>Selco parkle supplemented with L-carnitine on fatty acid composition. Rotifers were enriched with singly or in a combination of commercial products with or without L-carnitine; S. parkle, S. parkle+Algamac 3050, S. parkle+Olio &omega;-3, S. parkle+Algamac 3050+Olio &omega;-3, S. parkle+L-carnitine, S. parkle+Algamac 3050+L-carnitine, S. parkle+Olio &omega;-3+L-carnitine, S. parkle+Algamac 3050+Olio &omega;-3+L-carnitine. Considerable differences were found in the fatty acid composition of <i>B. plicatilis</i> fed with commercial enrichment diets. The highest EPA, DHA and PUFA were determined in rotifers enriched with S. parkle+Olio &omega;-3+L-carnitine, S. parkle+Algamac 3050+L-carnitine, S. parkle+Olio &omega;-3+Algamac 3050+L-carnitine, respectively at 6 hour. The enrichment duration was found to have significant effect on PUFA content of rotifers (<i>p</i><0.05). This study clearly showed that L-carnitine can be used with commercial products to enrich the fatty acid contents of rotifers in marine fish hatcheries.</span></span></span></span></span></span></span> Brachionus plicatilis, Fatty acid composition, L-carnitine, Algamac 3050, Olio ω-3 1097 1107 http://jifro.ir/browse.php?a_code=A-10-3342-2&slc_lang=en&sid=1 H.B.E. Ozdogan hasanozdogan@isparta.edu.tr 100319475328460046494 100319475328460046494 Yes Isparta University of Applied Sciences, Egirdir Faculty of Fisheries, Department of Aquaculture, Isparta-Turkey S. Savas 100319475328460046495 100319475328460046495 No Isparta University of Applied Sciences, Egirdir Faculty of Fisheries, Department of Aquaculture, Isparta-Turkey